Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

- check cable
- be sure battery is full, connect charger all the time
- check version you want to upload with version you have (DDE), post here, maybe someone has same problem

Also, if you have CoApi error maybe your application is outdated for your car. You should find latest files to update ediabas, files from 2011 are like 11 GB for all car, 450 MB E83 only.

if software is not updated you are probably on old version but something else went wrong, use INPA or DIS to find exact error and post here.

Also : may be scary at this moment but don't worry, nothing is broken, you just need to find what is wrong and to do correct update.

Finally : IF your SSS is outdated I don't know how this can be updated, but winkfp can be updated using SSS files, just more things need to be do manually and be aware that this is using 32 bit ediabas which won't work with ncsexpert, install that to separeted folder (e.g. change folder to ediabas32)

I had the same issue while updating my ECU...
The error in Progman was:
Operations : Diagnostic trouble 2000 CoApi - EDIABAS or ECU descroption file error
Diagnostic trouble 2020(Coapi) - Control unit does not respond
The battery voltage was about ~12.5 without external charger. The cable is a KKL cable used for vagcom too, with FTDI chip reprogrammed. With this cable i succesfully programmed other parts : cluters, lights..with progman too in CAR section when when it comes about ecu update..i got the errors above.
After that I tried with WINFKP..i set it up correctly..with the correct data files..but the same issue Error 606: Diagnosis: Error reading ECU programming status...in INPA i got now ecu rejected..
What do you think that could be? The KKL cable is not good ?